Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec8cc7a89da77c7…

MALICIOUS

PDF

100.0 KB Created: 2021-03-28 01:45:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 337f1e7ac7f0a73d3abf1de5a9cba536 SHA-1: ea1cfcfc0592865b8d84f555c8549a4fad189632 SHA-256: 3ec8cc7a89da77c7a0a2df9b0fe54ba722f9cceb356285518f9ab18e01f59182
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/wix?keyword=neverwinter+ps4+guide+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371809/normal_60285686c9228.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/ieppFib/minecraft_more_mobs_mod_1._8._9.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/akgfvRe/niwopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449181/normal_600d27af2f7b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386086/normal_604861567abb3.pdfIn PDF document text
    • http://falupopakiwowe.22web.org/nikajasu.pdfIn PDF document text
    • http://ladokewukuman.iblogger.org/sewoboririmulutuvigazibe.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/hd2xMge/75574585345.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403938/normal_5ff56b08b580c.pdfIn PDF document text
    • https://cdn.sqhk.co/gevagedubop/hcEgcjc/football_2015_world_cup_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/gigijuke/gfyWDig/outlier_definition_iqr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451551/normal_5fd22bf7cb484.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_af077f0697204c429fe180e62fab98e0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d722bb24-f19f-4766-a273-b6c9924712fa/audre_lorde_sister_outsider_citation.pdfIn PDF document text
    • http://fasevofal.epizy.com/the_untouchables_fall_guy_cast.pdfIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_fa4bf8e9431c42b7b6d074884cb7337e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/42b7fd3d-2531-454a-9c4f-e0cbdba9e907/31285287161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/795384b7-d888-416c-913a-5e064b5af609/pellon_p44f_interfacing_instructions.pdfIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_fcfa9dc391cc4c3389d7f8fdb6233f4d.pdf?index=trueIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_b81e9f803e9c44dcba714e093a6a560d.pdf?index=trueIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_989ca9af0ba04c02ae32d4d63fba4393.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000148c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148C3 5616 bytes
SHA-256: 67e45f72be08f434ae69a01ab2d805adc7b5a72e63a6ce8e52d1d7b69c54269e
font_01_sfnt_off00015c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C22 11332 bytes
SHA-256: a5582b31e476b7852635f2817e50229edfaae9ab2ba2cbd55e982b483ecc3880

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